<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>用户列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 点击按钮 -->
      <el-row>
        <el-col>
          <el-button
            type="primary"
            icon="el-icon-thumb"
            plain
            @click="addDialogVisible = true"
          >
            添加角色
          </el-button>
        </el-col>
      </el-row>
      <!-- 角色列表区域 -->
      <el-table :data="roleList" border stripe >
        <el-table-column type="expand" label="展开">
          <template slot-scope="scope">
            <el-row
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">
                  {{ item1.authName }}</el-tag
                >
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 渲染二级权限 -->
                <el-row
                  v-for="(item2, i2) in item1.children"
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                      >{{ item2.authName }}</el-tag
                    >
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 渲染三级级权限 -->
                  <el-col :span="18">
                    <el-tag
                      type="info"
                      v-for="item3 in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                      >{{ item3.authName }}</el-tag
                    >
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <el-table-column type="index" label="索引"></el-table-column>
        <el-table-column prop="roleName" label="角色名称"></el-table-column>
        <el-table-column prop="roleDesc" label="角色描述"></el-table-column>
        <el-table-column label="操作">
          <template slot-scope="scope">
            <!-- 编辑按钮 -->
            <el-tooltip content="编辑" placement="top">
              <el-button
                size="mini"
                type="primary"
                icon="el-icon-edit"
                plain
                @click="showEditDialog(scope.row.id)"
                >编辑</el-button
              >
            </el-tooltip>
            <!-- 删除按钮 -->
            <el-tooltip content="删除" placement="top">
              <el-button
                size="mini"
                type="danger"
                icon="el-icon-delete"
                plain
                @click="removeUserByID(scope.row.id)"
                >删除</el-button
              >
            </el-tooltip>
            <!-- 分配权限按钮 -->
            <el-tooltip content="分配权限" placement="top">
              <el-button
                size="mini"
                type="warning"
                icon="el-icon-setting"
                plain
                @click="showSetRightDialog(scope.row)"
                >分配</el-button
              >
            </el-tooltip>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 添加用户的对话框 -->
    <el-dialog
      title="添加角色"
      @close="addDialogClosed"
      :visible.sync="addDialogVisible"
      width="50%"
    >
      <!-- 内容主体区域 -->
      <el-form
        :model="addRoleForm"
        :rules="addRoleFormRules"
        ref="addRoleFormRef"
        label-width="80px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addRoleForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addRoleForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部按钮区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addUser">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 修改用户的对话框 -->
    <el-dialog
      title="修改角色"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClosed"
    >
      <!-- 内容主体区域 -->
      <el-form
        :model="editRoleForm"
        :rules="editRoleFormRules"
        ref="editRoleFormRef"
        label-width="70px"
      >
        <el-form-item label="角色名" prop="roleName">
          <el-input v-model="editRoleForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editRoleForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部按钮区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editUser">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 分配权限对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogColsed"
    >
      <!-- 树形权限控件 -->
      <el-tree
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        :data="rightsList"
        :props="treeProps"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  name: 'Roles',
  data() {
    return {
      //所有角色列表数据
      roleList: [],
      //所有权限的数据
      rightsList: [],
      //默认选中的节点ID值数组
      defKeys: [],
      //即将分配权限的角色
      roleID: '',
      //树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children',
      },
      addDialogVisible: false, //定义添加对话框的显示与隐藏
      editDialogVisible: false, //定义修改对话框的显示与隐藏
      setRightDialogVisible: false, //定义分配权限对话框的显示与隐藏
      addRoleForm: {
        //添加用户的表单数据
        roleName: '',
        roleDesc: '',
      },
      addRoleFormRules: {
        //添加表单的验证规则对象
        roleName: [
          { required: true, message: '请输入角色名', trigger: 'blur' },
          {
            min: 3,
            max: 10,
            message: '用户名的长度在3到10个字符之间',
            trigger: 'blur',
          },
        ],
      },
      editRoleForm: {
        //添加角色的表单数据
      },
      editRoleFormRules: {
        //修改表单的验证规则对象
        roleName: [
          { required: true, message: '请输入角色名', trigger: 'blur' },
          {
            min: 3,
            max: 10,
            message: '用户名的长度在3到10个字符之间',
            trigger: 'blur',
          },
        ],
      },
    }
  },
  created() {
    this.getRoleList()
  },
  methods: {
    //获取所用角色数据
    async getRoleList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败!')
      }
      this.roleList = res.data
    },
    //监听添加角色对话框的关闭事件
    addDialogClosed() {
      this.$refs.addRoleFormRef.resetFields()
    },
    //添加角色预校验
    addUser() {
      this.$refs.addRoleFormRef.validate(async (valid) => {
        console.log(valid)
        if (!valid) return
        const { data: res } = await this.$http.post('roles', this.addRoleForm)
        if (res.meta.status !== 201) {
          return this.$message.error('添加角色失败!')
        }
        //提示角色
        this.$message.success('添加角色成功')
        //刷新列表
        this.getRoleList()
      })
      //关闭对话框
      this.addDialogVisible = false
    },

    //修改用户信息
    async showEditDialog(val) {
      const { data: res } = await this.$http.get('roles/' + val)
      if (res.meta.status !== 200) {
        return this.$message.error('查询用户信息失败')
      }
      this.editRoleForm = res.data
      this.editDialogVisible = true
    },
    //监听修改用户对话框的关闭事件
    editDialogClosed() {
      this.$refs.editRoleFormRef.resetFields()
    },
    //修改用户信息并且提交进行预验证
    editUser() {
      this.$refs.editRoleFormRef.validate(async (valid) => {
        if (!valid) return
        const { data: res } = await this.$http.put(
          'roles/' + this.editRoleForm.roleId,
          {
            roleName: this.editRoleForm.roleName,
            roleDesc: this.editRoleForm.roleDesc,
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('更新角色信息失败!')
        }
        //提示用户
        this.$message.success('更新角色信息成功!')
        //刷新列表
        this.getRoleList()
      })
      //关闭对话框
      this.editDialogVisible = false
    },
    //删除按钮通过ID删除
    async removeUserByID(val) {
      //弹窗询问是否删除
      const confirmResult = await this.$confirm(
        '此操作将永久删除该用户, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning',
        }
      ).catch((error) => {
        return error
      })
      //如果用户确认删除返回值为字符串 confirm,用户取消则返回字符串 cancel
      if (confirmResult !== 'confirm') {
        return this.$message.info('已经取消删除')
      }
      const { data: res } = await this.$http.delete('roles/' + val)
      if (res.meta.status !== 200) {
        return this.$message.error('删除角色失败！')
      }
      this.$message.success('删除角色成功！')
      this.getRoleList()
    },
    //通过ID删除对应的权限
    async removeRightById(role, rightId) {
      //弹框提示用户是否要删除
      const confirmResult = await this.$confirm(
        '此操作将永久删除该角色, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning',
        }
      ).catch((error) => {
        return error
      })
      //如果用户确认删除返回值为字符串 confirm,用户取消则返回字符串 cancel
      if (confirmResult !== 'confirm') {
        return this.$message.info('已经取消删除')
      }
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      )
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败！')
      }
      this.$message.success('删除权限成功！')
      role.children = res.data
    },
    //分配权限
    async showSetRightDialog(role) {
      this.roleID = role.id
      //获取所有权限数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限失败!')
      }
      //获取到的权限数据保存到数据中
      this.rightsList = res.data
      //获取三级节点
      this.getLeafKeys(role, this.defKeys)

      this.setRightDialogVisible = true
    },
    //通过递归形式获取角色下三级权限的ID并且保存到data
    getLeafKeys(node, arr) {
      //如果当前node节点不包含children则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach((item) => this.getLeafKeys(item, arr))
    },
    //关闭权限对话框重置
    setRightDialogColsed() {
      this.defKeys = []
    },
    //提交角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys(),
      ]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(
        `roles/${this.roleID}/rights`,
        { rids: idStr }
      )
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败!')
      }
      this.$message.success('分配权限成功!')
      this.getRoleList()
      this.setRightDialogVisible = false
    },
  },
}
</script>

<style>
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>